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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Agents
Dev Platform
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Perplexity
S
Elicit
S
ChatGPT Operator
B
Manus
S
TaglineAI search done right. Cited answers, not chat theater.AI research assistant for academic literature.OpenAI's browser agent. Clicks and types on websites for you.Autonomous AI agent that actually finishes tasks.
CategoryResearchResearchAgentsAgents
PricingFree + $20/mo ProFree + $12-$42/moIncluded with ChatGPT Pro $200/moFree tier + $39-$199/mo
Best forReplacing Google for any question where you want a cited answer in seconds.Grad students, researchers, anyone doing literature reviews.Power users willing to pay $200/mo for a browser bot.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Academic-only
  • Can hallucinate citations — verify everything
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier for academic research. Nothing else comes close for systematic reviews.B-tier. Still early. Manus is more flexible for less money.S-tier in the agent category. The first one I'd give to a non-technical friend.
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